667276013 has 2 divisors, whose sum is σ = 667276014. Its totient is φ = 667276012.

The previous prime is 667276009. The next prime is 667276031. The reversal of 667276013 is 310672766.

Together with next prime (667276031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549292969 + 117983044 = 23437^2 + 10862^2 .

It is a cyclic number.

It is not a de Polignac number, because 667276013 - 2² = 667276009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667276003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333638006 + 333638007.

It is an arithmetic number, because the mean of its divisors is an integer number (333638007).

Almost surely, 2^667276013 is an apocalyptic number.

It is an amenable number.

667276013 is a deficient number, since it is larger than the sum of its proper divisors (1).

667276013 is an equidigital number, since it uses as much as digits as its factorization.

667276013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 667276013 is about 25831.6862206090. The cubic root of 667276013 is about 873.8465402132.

The spelling of 667276013 in words is "six hundred sixty-seven million, two hundred seventy-six thousand, thirteen".